TrianglePredicate.h

/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2012 Excensus LLC.
 *
 * This is free software; you can redistribute and/or modify it under
 * the terms of the GNU Lesser General Licence as published
 * by the Free Software Foundation. 
 * See the COPYING file for more information.
 *
 **********************************************************************
 *
 * Last port: triangulate/quadedge/TrianglePredicate.java r524
 *
 **********************************************************************/
 
#ifndef GEOS_TRIANGULATE_QUADEDGE_TRIANGLEPREDICATE_H
#define GEOS_TRIANGULATE_QUADEDGE_TRIANGLEPREDICATE_H
 
namespace geos {
namespace geom { // geos.geom
 
class Coordinate;

class TrianglePredicate 
{
public:
  static bool isInCircleNonRobust(
          const Coordinate &a, const Coordinate &b, const Coordinate &c, 
          const Coordinate &p);
  
  static bool isInCircleNormalized(
          const Coordinate &a, const Coordinate &b, const Coordinate &c, 
          const Coordinate &p);
 
private: 
  static double triArea(const Coordinate &a,
                  const Coordinate &b, const Coordinate &c);
 
public:
  static bool isInCircleRobust(
          const Coordinate &a, const Coordinate &b, const Coordinate &c, 
          const Coordinate &p);
} ;
 
} // namespace geos.geom
} // namespace geos
 
#endif //GEOS_TRIANGULATE_QUADEDGE_TRIANGLEPREDICATE_H